First slide

Different type of processes

Question

During an isothermal expansion, a confined ideal gas does 150J of work against its surroundings. This implies that:

Easy

A

150 J of heat has been removed from the gas
B

300 J of heat has been added to the gas
C

No heat is transferred because the process is isothermal
D

150 J of heat has been added to the gas

Solution

in isothermal process $∆ U = 0 so Q = W = 150 J$

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